CN219452847U - Worm and gear structure capable of automatically eliminating gaps - Google Patents

Abstract

The utility model discloses a worm and gear structure capable of automatically eliminating gaps, which comprises a worm, a box body and a servo feeding motor, wherein a worm wheel is arranged in the box body and is connected with an upper part and a lower part through a middle mounting spring, and the worm is positioned between the box body and the servo feeding motor; two compression nuts are arranged on two sides of the worm wheel, and the compression nuts are stepped; the inside of the box body is also provided with a dividing head spindle, a first roller bearing and a second roller bearing, and the first roller bearing and the second roller bearing are arranged on the surfaces of two sides of the dividing head spindle; one end of the dividing head main shaft is provided with a code dial; according to the utility model, the worm wheel is divided into two parts by utilizing the spring with proper torque, so that the worm wheel and the worm keep gapless transmission motion within a certain range, the required precision can be achieved, the code table disc is used for detecting the angular displacement, the response speed is high, the measuring range is wide, the measuring precision is high, the dynamic measurement can be realized, the automation of measurement and data processing is easy to realize, and the anti-interference capability is high.

Description

Worm and gear structure capable of automatically eliminating gaps

Technical Field

The utility model belongs to the field of machining, and particularly relates to a worm and gear structure capable of automatically eliminating gaps.

Background

The worm gear is a common mechanical transmission structure, the helical teeth of the worm are inserted into the helical teeth of the worm wheel, the worm wheel is driven to rotate by the rotation of the worm, and due to errors in processing and abrasion in the using process, gaps are certainly formed between the worm wheel and the worm. At present, the gap between the worm wheel and the worm is eliminated mainly by the variable lead worm, the processing difficulty of the variable lead worm is high, and the gap eliminating effect can be achieved only by adjusting the thickness of the worm gasket for many times by a professional during the first assembly, so that the gap can be generated again and the gap is larger and worse and the precision is worse along with the abrasion between the worm wheel and the worm in the use process, and finally the precision of a processed workpiece is seriously influenced. Therefore, the lead-variable worm needs to be maintained and adjusted by professionals regularly, so that the production efficiency is greatly reduced, and the use cost is increased.

In order to further solve the technical problems, the Chinese patent application with the publication number of CN209212946U discloses an automatic clearance eliminating worm gear structure, which comprises a worm gear and a worm, wherein the worm gear and the worm are mutually matched; the worm comprises a worm shaft, a worm sleeve, a spring, a compression nut and a locking nut; the worm shaft is connected with the worm sleeve through a spline, and one ends of the worm shaft and the worm sleeve are fixed through the compression nut and the locking nut. The automatic gap eliminating worm is simple to process, can achieve the effect of automatic gap eliminating without manual adjustment in assembly, can always ensure the rotating precision of rotating equipment, can achieve maintenance-free of the worm gear only by one-time assembly, and greatly prolongs the service life of the worm gear. The structure solves the problem of manual adjustment to a certain extent, but meets high precision requirement, and when fine adjustment is needed in a certain range, the structure still needs to be adjusted by a worker at any time. Therefore, how to design a worm and gear structure with automatic gap elimination, high response speed, wide measuring range and high measuring precision is a technical problem which needs to be solved by the person skilled in the art at present.

Disclosure of Invention

In order to solve the technical problems, the utility model provides the following technical scheme: the worm and gear structure capable of automatically eliminating gaps comprises a worm, a box body and a servo feeding motor, wherein a worm wheel is arranged in the box body and is divided into an upper part and a lower part, the worm wheel is connected with the upper part and the lower part through a middle mounting spring, and the worm is positioned between the box body and the servo feeding motor; two compression nuts are arranged on two sides of the worm wheel, and the compression nuts are stepped; the inside of the box body is also provided with a dividing head spindle, a first roller bearing and a second roller bearing, and the first roller bearing and the second roller bearing are arranged on the surfaces of two sides of the dividing head spindle; one end of the dividing head main shaft is provided with a code dial plate.

Preferably, a center is mounted at one end of the dividing head spindle, and two small-size fixing strips are mounted between the code table disc and the first roller bearing.

Preferably, the center mounting position is located at the outer side of the box body.

Preferably, a fixing device is further arranged at the upper end of the center, and a plurality of connecting holes are formed in the fixing device.

Preferably, the axis of the main shaft of the dividing head is perpendicular to the axis of the worm wheel.

Compared with the prior art, the utility model has the following beneficial effects:

1. the code table is used for detecting angular displacement, has the advantages of high response speed, wide measuring range and high measuring precision, can realize dynamic measurement, is easy to realize automation of measurement and data processing, and has stronger anti-interference capability.

2. Through increasing the spring, make it keep gapless transmission motion at certain within range worm wheel and worm, make it can reach the precision of needs, solve the condition that needs manual regulation precision, improve work efficiency greatly.

Drawings

Fig. 1 is a perspective view of an embodiment of the present utility model.

Fig. 2 is a cross-sectional view of an embodiment of the present utility model.

Fig. 3 is a schematic diagram of a worm gear connection according to an embodiment of the present utility model.

In the figure, 1, a code dial, 2, a dividing head main shaft, 3, a box body, 4, a first roller bearing, 5, a worm wheel, 6, a worm, 7, a servo feeding motor, 8, a second roller bearing, 9, a top point, 10, a fixing device, 11, a compression nut, 12, a lock nut, 13, a spring, 14 and a small-size fixing strip.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-3, an automatic gap eliminating worm and gear structure comprises a worm 6, a box 3 and a servo feeding motor 7, wherein a worm wheel 5 is arranged in the box 3, the worm wheel 5 is divided into an upper part and a lower part, the worm wheel 5 is connected with the upper part and the lower part through a middle mounting spring 13, and the worm 6 is positioned between the box 3 and the servo feeding motor 7; two compression nuts 11 are arranged on two sides of the worm wheel 5, and the compression nuts 11 are stepped; the inside of the box body 3 is also provided with a dividing head main shaft 2, a first roller bearing 4 and a second roller bearing 8, and the first roller bearing 4 and the second roller bearing 8 are arranged on the two side surfaces of the dividing head main shaft 2; one end of the dividing head main shaft 2 is provided with a code dial 1; the first roller bearing 4 and the second roller bearing 8 play a role in reducing friction, protecting the internal structure and prolonging the service life; the worm wheel 5 is hung on two sides of the spring 13 with proper torque, so that the worm wheel 5 and the worm 6 can keep gapless transmission movement within a certain range, and the device can reach the precision required by staff; the code dial 1 is used for detecting angular displacement, has the advantages of high response speed, wide range and high measurement precision, can realize dynamic measurement, is easy to realize automation of measurement and data processing, and has stronger anti-interference capability.

Referring to fig. 1-2, a tip 9 is mounted at one end of a dividing head spindle 2, and two small-size fixing strips 14 are mounted between a code table disc 1 and a first roller bearing 4; the small-size fixing strip 14 is used for fixing the code dial 1 and the first roller bearing 4, and stability and accuracy in work are ensured.

Referring to fig. 2, the center 9 is positioned outside the case 3; the center 9 is arranged on the outer side, so that the center 9 can be better operated conveniently, and the supporting and protecting effects on parts are improved.

Referring to fig. 1-2, a fixing device 10 is further installed at the upper end of the center 9, and a plurality of connecting holes are formed in the fixing device 10; the center 9 can support parts with complex end surfaces and parts which are not allowed to be drilled with center holes, and the fixing device 10 is matched with the center 9 for use, so that the effect is better.

Referring to fig. 2, the axis of the index head spindle 2 is perpendicular to the axis of the worm wheel 5; the vertical installation can ensure the compact internal structure, and the use space is reduced as much as possible under the condition of not influencing the work, thereby saving the occupied area.

Although embodiments of the present utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made therein without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims (5)

1. The utility model provides a worm gear structure that can automatic clearance that disappears which characterized in that: the automatic feeding device comprises a worm (6), a box body (3) and a servo feeding motor (7), wherein a worm wheel (5) is arranged in the box body (3), the worm wheel (5) is divided into an upper part and a lower part, the worm wheel (5) is connected with the upper part and the lower part through a middle mounting spring (13), and the worm (6) is positioned between the box body (3) and the servo feeding motor (7); two compression nuts (11) are arranged on two sides of the worm wheel (5), and the compression nuts (11) are stepped; the inside of the box body (3) is also provided with a dividing head main shaft (2), a first roller bearing (4) and a second roller bearing (8), and the first roller bearing (4) and the second roller bearing (8) are arranged on the surfaces of two sides of the dividing head main shaft (2); one end of the dividing head main shaft (2) is provided with a code dial plate (1).

2. The worm and gear structure capable of automatically eliminating gaps according to claim 1, wherein: an apex (9) is arranged at one end of the dividing head spindle (2), and two small-size fixing strips (14) are arranged between the code table disc (1) and the first roller bearing (4).

3. The worm and gear structure capable of automatically eliminating gaps according to claim 2, wherein: the center (9) is arranged at the outer side of the box body (3).

4. The automatically backlash eliminating worm gear structure according to claim 3, wherein: the upper end of the center (9) is also provided with a fixing device (10), and a plurality of connecting holes are formed in the fixing device (10).

5. The worm and gear structure capable of automatically eliminating gaps according to claim 4, wherein: the axis of the dividing head main shaft (2) is perpendicular to the axis of the worm wheel (5).